In 1907, Shapiro was born in
New York City,
New York,
United States,
North America. His parents had immigrated to the
United States with their previous four boys and three girls, as well as their niece. Jack was the only one of his family to be born in America. His father and two of his brothers did odd jobs for a living, resulting in earnings of $9.00 a week. Shapiro attended Evander Child High School in the
Bronx. While in high school, he was a starter on the football team for three straight years. During the last game in his senior year, however, he was injured and was forced out of the game. His playing weight in high school was . ==College career==